Thoughts on DIY Blue LED moon lights?

[Tom R]

I have them on about 2 hours before and after MH are on and off.

Tom R

[wolf_bluejay]

A while ago I ordered about 100 blue LED's for a few bucks, bought a few resistors, and built my own. I had a few power supplies kicking around, so I took some 3/4" PVC, cut it in half (long ways), drilled just the right sized holes for the LED's and wired it together.

Generally the effect was spectaular, and only cost my about $7 to put together. There is web site that even has a "designer" for what voltage power supply you have, what kind of LED's and will tell you how to wire it and what sized resistors you will need.

I bought a coralife blue led night light way before I built this one. I am now going to built one for my 72" tank. Done it before, and am going to do it again.
I would REALLY go with something with at a lot of LED's. the 1 and 2 LED are just not enough light. I might even have 30-50 LED left over after I'm done. It was cheaper to buy 100 than it was to buy just 25. At higher volumes you can get them for $.01-0.2 each. and a resistor is only about $.05 or so. I might just go with a 50 LED on the 72" tank. Just cause I can.

[Piscez]

Funny you should mention that, I have a bunch left over from years ago when I changed all my car interior lights to Blue LED's. As I mentioned I only had two in my coralife but I left them on all night!